<!DOCTYPE html>
<html lang="en" class="reftest-wait">
<meta charset="utf-8">
<title>Changes to background-position should invalidate properly for fieldsets.</title>

<style>

body {
  margin: 0;
}

#background {
  width: 100px;
  height: 100px;
  background-image: url(image_rgrg-256x256.png);
  background-repeat: no-repeat;
  background-position: 0 0;

  border: 0;
  padding: 0;
  margin: 0;
}

</style>

<fieldset id="background"><legend></legend></fieldset>

<script>

function doTest() {
  document.querySelector("#background").style.backgroundPosition = "-140px 0";
  document.documentElement.removeAttribute("class");
}
document.addEventListener("MozReftestInvalidate", doTest);

</script>
